Originally Posted by fast68plymouth
If you have a friend with a “known good” carb you can borrow....... you could try it and see if the problem went away or not.

If it acts the same, it’s unlikely a carb issue(and I don’t think it is).


Yeah, unfortunately I don't think it's the carb either, although taking it back to base line won't hurt.

Dwayne, you suspect the springs ? Even with my mild cam and rockers? And only at 4,000, rpm ? I' m gonna dig into the cap and rotor first and see if that helps.

Thanks for all the input and ideas everyone.👍

1966 Satellie.. 12.55 @107.75. 906 heads. 3780 lbs.